Heating-drum.



D. D. HARE.

HEATING DRUM.

I 'APPLIOATION FILED IEB. 4, 1908.

Patented Aug. 10, 1909.

2 SHEETS-SHEET 1.

T l gi ANDREW. B. QMIAM 00.. P

D. D. HARE.

HEATING DRUM.

APPLICATION FILED FEB. 4, 190a.

930,663, Patented Aug. 10, 1909.

2 SHEETS-SHEET 2.

nnrrnn STATES PATENT OFFICE.

DOCK D. HARR, OF MINNEAPOLIS, MINNESOTA.

HEATINGDBUM.

Specification of Letters Patent. Application filed February 4, 190B.

Patented Aug. 10, 1909.

Serial No. 414,169.

To all whom it may concern: 1

Be it known that I, DOCK D. HARE, a citizen of the United States, resi ing at Minna a olis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Heating- Drums; and I do hereby declare the following to be a full, clear, and exact description 'of the invention, such as will enable others shilledin the art to which it appertains to make and use the same.

My invention has for its object to rovide an improved heating drum of sim'p e constructron and increased efficiency, adapted for general use in connection with stoves and furnaces as an auxiliary heating device.

To the above ends of the novel devices and combinations of devices hereinafter described and defined in the claims.

trate the invention, like characters indicate like parts throughout the several 'vi-e'ws.-

Referring to the drawings, Figure 1 is a view in side elevation, showing the im' roved heating drum, some parts being y roken away and some parts being sectioned. Fig. 2 is a vertical section on the line a 0: of Fig. 1, some parts being left in full; and Figs. 3, 4 and 5 are horizontal sections taken respectively on the lines 00 x 00 and m m of Fig. 1-.

As preferably constructed, the body or outer shell 1 of the drum is a vertically 'disposed cylinder, but it may take various other forms in cross section. At itsupper end the shell is rovided with a head 2 and at its bottom it is formed with a downwardly converging hopper 3, the converging sides of which, as shown, are flat and terminate in channel-shaped guides 4., for engagement with the out turned flanges of a catchbox in the form of a drawer 5. The said shell 1 is supported in an u right position with the drawer 5 above the cor, by means of a plurality of legs 6.

Al but the extreme lower portions, to-wit, the hopper section 3, of the outer shell or drum 1, is divided diametrically into two compartments 1 and 1", by means of a partitionformed by a vertically extended and transversely elongated hot air pipe 7. This hot air pipe 7 extends slightly less than from side to side of the shell 1,'but is connected therewith, at its edges, by small webs 8 (see particularly Fig. 4) that complete the particasing 1. the invention consists through the In the accompanying drawings which illu'staken approximately tion. This construction also permits the air pipe 7 tobe surrounded almost entirely by the hot 'roducts of combustion from within the shel 1. At its upper end the air pipe 7 opens into the upper end head 2 of the shell 1; and at its lower end it is provided with diametrically extended air inlet ports 9 that open through the sides of the said casing, at points above the hopper 3-.

The hot products of combustion from the stove or furnace are conveyed by a smoke pipe (not shown) to an inlet port 10, which port opens through one side of the shell 1 and into the compartment 1 at a point very considerably below the top of the shell or The hot products of combustion are taken out of the compartment 1 through an outlet port formed in a smoke pipe 11, the lower end of which extends downward head 2 and terminates a very considerable distance below the said head. One or more vertical hot air pipes 12, of which, as shown, there are two, extend completely through the drum compartment 1; and, at their upper ends, open through the heads 2, while at their lower ends they open through one of the flat sides of the hopper 3. Afresh air inlet pipe 13 which may extend from the exterior of the room or building in which the drum is installed, is passed upward through the drum compartment 1 and, of course, through the head 2 and bottom of the hopper 3. Outside of the drum thefresh air inlet ipe 1-3 is provided with a short depending ranch pipe 14 which has a damper 15, and outward 0 said branch pipe 14 said pipe 13 is provided with a damper 16, the purpose of which will presently a pear. A hot air pipe which is similar to t e hot air pipes 12 extends upward completely through the drum compartment 1* and through the head 2, as well as through the bottom of the hopper 3. The upper end of this hot air pipe 17 terminates be ow but in direct line with a port 18 formed in a radially extended branch pipe 19 of the smoke pipe 11. n this branc 19 is a rotary sleeve i e valve 20 which has a port 21 adapted to be turned into and out of registration with the port 18 of the said branch pipe 19. The outer end of said valve 20 is closed and, as shown, is provided with a hand-piece 22 by means of which it may be easily rotated so as to open or close the port 18, at will.

lnFi'g 2 one'of the air pipes 12 is shown i as provided with a zigzag partition 23 which combustion siderable extent,

up-flowmg stream of air in the pipe 12 from i all particles of the air with the hot surface of the said tube. This partition, while in some cases desirable, is not a necessary fead ture of this invention.

The hot products of 1 up the port 18 in the smoke pipe branch 19, Combustion from a stove or furnace being thereby causing a large part of the hot air drawn into the chamber 1 a through the port which passes upward through the pipe 17 to 10 will be drawn downward through the said pass directly into compartment at a point below the lower end of the partition-forming air pipe 7 and from thence will pass upward into the drum conipartment l In passing downward through the compartment 1 the hot products of will completely surround the air pipes 12, thus heating the same; and, in passing upward through the compartment 1 wi surround and heat the air pipes 13 and 1e space between the lower portion of combustion in passing from the compartment 1 2' to the compartment 1 will not agitate, to any conthe air in the bottom of said hopper, and, hence, will permit precipitation of more or less soot into the drawer or catcha1r pipes 12, 13

box 5. The products of combustion in the drum compartments 1* and I will also heat the centra ly located partition-forming air pipe 7.

The products of combustion, in passing through the compartments 1 and l of the drum, are not by the draft itself carried to the top of the drum, but, on the contrary, a

. sort of a dead air space is cut off from the draft in the upper end of the said drum. In spite of this direct draft from the inlet port 10 to the outlet port in the lower end of the smoke pipe 11, the very hottest of the hot or burning gases in the drum will, under the action of convection, continuously work their way into the so-called dead air chamber in y the upper portion of said drum, and, hence, constantly to keep the upper portions of the and 17 and the depending portion of the smoke pipe 11 at very high temperature. This is very important because it thus tends to increase the force of in the stove or I The transversely extended partition-forming air pipe 7 prevents the setting up of a vortex or spiral motion of the )roducts of hrough the drum, and it 1s itself placed where it will be l subject to very intense heat. The hot air pipe draws in air at points above the points where the air is drawn in through the other hotair pipes and minimizes the draft on the or quite from end to end lfloor.

to deflect the from the pipe 14 should be closed and the valve 16 in the pipe 13 should, of course, be opened. If when this is done, or at any other time for that matter, it is desired to draw from the room part of the circulating air, this may be the valve 20 so as to open the smoke pipe 11. When air is thus admitted to the smoke pi )e 11, it will produce more or less of a check to the draft of the stove or furnace. When the Valve 20 is turnedso as to close the port 18,

into the room. When the valve 16 in the pipe 13 is closed and the valve 15 in the branch pipe 14 is opened, the pipe 13'will act simply as a hot air pipe for circulating the air in the room.

he drawer or catch-box 5 is detachably and slidably connected to the flanged bottom of the hopper 3 in such manner that it may be applied thereto from either side. This makes it possible to ap ly and remove the drawer regardless of whic 1 side the drum is located adjacent to a wall or other obstruction.

What I claim is: 1. The combination with an uprightheating drum having an air inlet port at one side, located a considerable distance below its top, and having a smoke inlet flue extending a considerable distance downward within said drum, of a transverse vertically extended partition located between said inlet port and the said smoke outlet flue, and dividing the upper portion of said drum into two compartments, both of the said compartments having dead air spaces at the top of the drum, and one of which dead air spaces surrounds the depending portion of said smoke outlet flue, substantially as described.

2. The combination with an upright heating drum having an inlet port at one side located a considerable distance below its top and having a smoke outlet fiue extending dividing the upper portion of said drum into two compartments, and. hot air pipes extending vertically through the two compartments of said drum, substantially as described.

3. The combination with an upright heating drum, having inlet and outlet ports for the products of combustion, of a )artition located between said inlet and outlet ports and dividing the upper portion of said drum into compartments, air pipes extending vertically upward through the compartments of said drum, and a said drum, and means whereby one of the I said air pipes may be thrown into communi cation with the outlet of combustion from sai as described.

and vertically extended air pipe located between said inlet and outlet ports and dividort for the products i ing said drum into two compartments, the El drum, substantially ports that 0 en at diametrically opposite 4. The combination with an upright drum points througi the sides of the said drum, having an inlet port and a smoke outlet pipe, and air pipes extending vertically through the of a hot air pipe extending upward through compartments of said drum, substantially as branch pipe from said described. smoke pipe having a valved port located im- In testimony whereof I afiix my signature mediately above the upper end of said air in presence of two witnesses. pipe, substantially as and for the purposes DOCK D HARE set forth.

5. The combination with an upright heating drum having inlet and outlet ports for the products of combustion, of a transversely Witnesses:

H. D. KrLGoRE, F. D. MERCHANT.

said partition-forming air pipe having inlet 1 

